Pull requests discourage experiments because changes can only propagate after approval. The idea behind PRs is to only approve "good" changes.
First, the learning opportunities of mistakes are gone. Second, you might loose interest in experimenting because you are afraid of making mistakes.
Today I just needed to run. I had not run since I hurt my achilles tendon almost a month ago. I wanted to see if it still hurt. I felt something, but not too much. I think I still need to take it easy with running, but man it felt good moving again.

If you want to know how to implement a Bash-like shell, with support for redirects, in only 31 lines of Python, you should check out my latest blog post Bash Redirects Explained.
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